Why must your line intersect the origin of the graph ( zero concentration equals zero absorbance)
Homework Answers
If the straight line has good correlation but does not pass through the origin, a systematic error would be suspected, such as calibration of instrument, etc.
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Why must your line intersect the origin of the graph ( zero concentration equals zero absorbance)
why is it important to force the trendline in the plot of absorbance vs concentration through...
why is it important to force the trendline in the plot of absorbance vs concentration through the origin? Would adding the point (0,0) have had the same effect? Why or why not? (Beer's Law experiment)
11. You produce a graph of absorbance vs. concentration which yields the equation y=1579.7x. If the...
11. You produce a graph of absorbance vs. concentration which yields the equation y=1579.7x. If the concentration of salicylic acid increased by 1/3 would you expect the absorbance to also increase by 1/3? Explain your reasoning using Beer's law.
Here are the graphs. instrument should have an absorbance reading of zero when there is no...
Here are the graphs.
instrument should have an absorbance reading of zero when there is no CuS04 present. Print copies of the graph for you and your partner to submit with your lab reports. Calculate the concentration of the unknown using the equation for the line. emros Concentration (M) Absorbance 0.5 1.005 0.3 0.704 0.617 0.25 0.1 0.291 0,05 0.131 0.513 Concentration VS Absorbance 1.2 y 2.1773x R2 0.9566 1 e4e4eeresases4s4 0.8 0.6 0.4 0.2 0.4 0.5 0.6 0.1 0.2...
Why is it appropriate to connect the data points for graph 1 (absorbance vs wavelength) but...
Why is it appropriate to connect the data points for graph 1
(absorbance vs wavelength) but not appropriate for graph 2
(absorbance vs concentration)? What type of information does each
graph convey?
Absorbance vs Wavelength 0.55 0.50 0.45 0.40 0.15 0.30 Absorbance 0.25 0.20 0.15 0.10 . 0.00 380 400 4200 460 480 500 520 540 560 580 600 620 640 660 680 700 720 700 750 780 Wavelength Absorbance vs Concentration 0.45 y = 0.002 x 0.002 R=0.9997 0.40...
Need a graph with the absorbance and the concentration plotted with the x and y axis...
Need a graph with the absorbance and the concentration plotted with
the x and y axis the unknown is .508 absorbance and the the unknown
concentration is 24.19 . With these values beers gas laws
15 EXPERIMENT 45 Report Sheet 1. Unknown number 2. Data table Tube # | Dye olume (mL) | DyeconcentrationhW | Ahorhance (520mm, 0 c00 20 32698 | 85-1 | :779 :132 46.8 3. Unknown absorbance value 4 Uniknown concentration from the graph
Can someone please help me to plot a graph for an unknown sample thats absorbance is .154 and cal...
can
someone please help me to plot a graph for an unknown sample thats
absorbance is .154 and calculate the unknown concentration using
A=K*M
concentration of a Solution by Absorbance Measurement Unknown Concentration X103 From Part A) x io4 Absorbance Part C: Absorbance as a function of concentration Plot absorbance versus concentration and draw best fit line. Attach graph. Refer to the instructions in Part Cof the procedure Part D: Unknown concentration Determine the concentration of your unknown sample using...
Why must the standard curve pass through the origin (the zero point on both axes)?
Why must the standard curve pass through the origin (the zero point on both axes)?
Your professor created a standard curve with a best-fit line. The equation of the line is...
Your professor created a standard curve with a best-fit line. The equation of the line is y=0.245x+0.342. a) Calculate the concentration (in %) for the following absorbance values. 0.342, 3.861, 1.462 b) What absorbance would you expect to measure for the following concentrations 18%, 4%, 50% c) Draw a graph of the best fit line. Include three errors on the graph. Explain what those errors are and then explain how you would fix those errors to make the graph more...
2. Using the equation of the line from the graph below, calculate the concentration of hydrogen...
2. Using the equation of the line from the graph below, calculate the concentration of hydrogen peroxide if 820 mL of foam is produced from the reaction with potassium iodide. Foam Production vs. Concentration H₂O₂ y = 49.534x R = 0.9677 Volume Foam 20 5 10 15 Concentration (%) H,02 3. Why is it important to set your intercept to zero when preparing your graph from the data of foam produced?
0 intersect only at (0,0) g(r)at z arctan(3z) Show that the graph y f(x) and its tangent line y p...
0 intersect only at (0,0) g(r)at z arctan(3z) Show that the graph y f(x) and its tangent line y po Consider the ftunction f(x) Intermediate steps: 1) The lIne tangent to y f(x)atz -0isy g(x) where g(r) 9(a)- 2Let H(x) f(x) - 9(x) The derivative ot H (x)s H'(z) = which is zero only when x = Rolle's theorem to H (x) on the interval [ri, 0]. Get a contradiction. 4) Now assume that we have zp O where f(2)-9(T2)...
11. You produce a graph of absorbance vs. concentration which yields the equation y=1579.7x. If the concentration of salicylic acid increased by 1/3 would you expect the absorbance to also increase by 1/3? Explain your reasoning using Beer's law.
Here are the graphs.
instrument should have an absorbance reading of zero when there is no CuS04 present. Print copies of the graph for you and your partner to submit with your lab reports. Calculate the concentration of the unknown using the equation for the line. emros Concentration (M) Absorbance 0.5 1.005 0.3 0.704 0.617 0.25 0.1 0.291 0,05 0.131 0.513 Concentration VS Absorbance 1.2 y 2.1773x R2 0.9566 1 e4e4eeresases4s4 0.8 0.6 0.4 0.2 0.4 0.5 0.6 0.1 0.2...
Why is it appropriate to connect the data points for graph 1
(absorbance vs wavelength) but not appropriate for graph 2
(absorbance vs concentration)? What type of information does each
graph convey?
Absorbance vs Wavelength 0.55 0.50 0.45 0.40 0.15 0.30 Absorbance 0.25 0.20 0.15 0.10 . 0.00 380 400 4200 460 480 500 520 540 560 580 600 620 640 660 680 700 720 700 750 780 Wavelength Absorbance vs Concentration 0.45 y = 0.002 x 0.002 R=0.9997 0.40...
Need a graph with the absorbance and the concentration plotted with
the x and y axis the unknown is .508 absorbance and the the unknown
concentration is 24.19 . With these values beers gas laws
15 EXPERIMENT 45 Report Sheet 1. Unknown number 2. Data table Tube # | Dye olume (mL) | DyeconcentrationhW | Ahorhance (520mm, 0 c00 20 32698 | 85-1 | :779 :132 46.8 3. Unknown absorbance value 4 Uniknown concentration from the graph
can
someone please help me to plot a graph for an unknown sample thats
absorbance is .154 and calculate the unknown concentration using
A=K*M
concentration of a Solution by Absorbance Measurement Unknown Concentration X103 From Part A) x io4 Absorbance Part C: Absorbance as a function of concentration Plot absorbance versus concentration and draw best fit line. Attach graph. Refer to the instructions in Part Cof the procedure Part D: Unknown concentration Determine the concentration of your unknown sample using...
2. Using the equation of the line from the graph below, calculate the concentration of hydrogen peroxide if 820 mL of foam is produced from the reaction with potassium iodide. Foam Production vs. Concentration H₂O₂ y = 49.534x R = 0.9677 Volume Foam 20 5 10 15 Concentration (%) H,02 3. Why is it important to set your intercept to zero when preparing your graph from the data of foam produced?
0 intersect only at (0,0) g(r)at z arctan(3z) Show that the graph y f(x) and its tangent line y po Consider the ftunction f(x) Intermediate steps: 1) The lIne tangent to y f(x)atz -0isy g(x) where g(r) 9(a)- 2Let H(x) f(x) - 9(x) The derivative ot H (x)s H'(z) = which is zero only when x = Rolle's theorem to H (x) on the interval [ri, 0]. Get a contradiction. 4) Now assume that we have zp O where f(2)-9(T2)...
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